/*
 * Copyright 2002-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hqd.ch03.v36.beans;

import java.beans.PropertyChangeEvent;

/**
 * Superclass for exceptions related to a property access,
 * such as type mismatch or invocation target exception.
 *
 * @author Rod Johnson
 * @author Juergen Hoeller
 */
@SuppressWarnings("serial")
public abstract class PropertyAccessException extends BeansException {

    private final PropertyChangeEvent propertyChangeEvent;


    /**
     * Create a new PropertyAccessException.
     *
     * @param propertyChangeEvent the PropertyChangeEvent that resulted in the problem
     * @param msg                 the detail message
     * @param cause               the root cause
     */
    public PropertyAccessException(PropertyChangeEvent propertyChangeEvent, String msg, Throwable cause) {
        super(msg, cause);
        this.propertyChangeEvent = propertyChangeEvent;
    }

    /**
     * Create a new PropertyAccessException without PropertyChangeEvent.
     *
     * @param msg   the detail message
     * @param cause the root cause
     */
    public PropertyAccessException(String msg, Throwable cause) {
        super(msg, cause);
        this.propertyChangeEvent = null;
    }


    /**
     * Return the PropertyChangeEvent that resulted in the problem.
     * <p>May be {@code null}; only available if an actual bean property
     * was affected.
     */

    public PropertyChangeEvent getPropertyChangeEvent() {
        return this.propertyChangeEvent;
    }

    /**
     * Return the name of the affected property, if available.
     */

    public String getPropertyName() {
        return (this.propertyChangeEvent != null ? this.propertyChangeEvent.getPropertyName() : null);
    }

    /**
     * Return the affected value that was about to be set, if any.
     */

    public Object getValue() {
        return (this.propertyChangeEvent != null ? this.propertyChangeEvent.getNewValue() : null);
    }

    /**
     * Return a corresponding error code for this type of exception.
     */
    public abstract String getErrorCode();

}
